I have an astro with a p 420 catylitic converter low effitiency

2000 CHEVROLET ASTRO
145,000 MILES
Avatar
HORSESHOE
  • MEMBER
  • 7 POSTS
while driving engine slightly hasitates seems to indicate missfire
Nov 2, 2011 at 7:30 PM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
cat has failed most likely from a missfire you have. the unburned fuel is what kills the converter.
i suggest you resolve the missfires and you will still most likely have to replace the cat as well.

Roy
Nov 2, 2011 at 7:33 PM